Now that DisplayLink has released beta drivers for their USB Video chipsets, I have been testing Toshiba Dynadocks on my Intel Mini and have been very happy with the results. The docks are working great! I have tested both the DVI and VGA versions of the Dynadock with both types of monitors and am getting good performance. There are some limitations, but I'm very happy to be using Multimon again after having it in the PC world. Youtube videos look great on the 2nd monitor. Make sure to check out the readme for the Mac OS driver at DisplayLink.

Well, looks good. I even have an Imac lamp that would do just fine, but then the reason Im not using it is the noisier attitude. "Borrowing" the screen would be just fine if I could cut the noise down: I mostly do word processing and I need peace. I have a nice 20" eizo pivot oldie screen with my mini, and would like to get an identical second one.
Also, Im intending to use the two mini setup via a Belkin KVM switch I just bought: So the idea was: belkin one monitor, keyboard and mouse, with the main mini getting another monitor. Will see.
Dynadock is readily available on the market here, but then it specifically says G4 is a no go. Not sure why...
And yes, my other lane was heading towards a newertech usb-vga adapter... but I find it somewhat expensive. I could buy a 27" that would probably solve all these without hassles, if I only could
Thanks a lot and please tell me if you think a g4 mini is a dead end as far as the two monitors scenario is concerned.
A happy new year!

What if I install screen recycler on both minis, that is when I use one the other is a screen, and then when I switch, the other is served? It could work, I guess, and I could ask a friend to write me a quick software switch between the two screen recycler sessions running. Just a thought...

Yes, you can do that.... on the main Mini, you install ScreenRecycler and on the secondary Mini, you install "JollysFastVNC". You can see the effect in the video here: http://www.screenrecycler.com/video.html